Organic Asparagus Fertilizer 3 lbs. Organic Asparagus Fertilizer All-Natural & Non-GMO Sourced Asparagus Fertilizer (4-3-1). 3 lbs. will feed 45' asparagus row for an entire season. Guaranteed to increase yields, size, health and vigor of your asparagus plants. Derived from: Fish Bone Meal, Gypsum, Blood Meal, Alfalfa Meal, Sulfate of Potash & Feather Meal.